Drill-holder.



f). B. SGHOENKY. DRILL HOLDER.

APPLICATION FILED FEB.3, 1913.

1 1@1 966, Patented June 30,1914.

5W .a M g OTTO B. SCHOENKY, OF SACRAMENTO, CALIFORNIA.

DRILL-HOLDER Specification of Letters Patent.

Patented June 30, 1914.

Application filed February .3, 1913. Serial No. 746,022.

To all whom it may concern Be it known that I, Orro B. SoHoE KY, a citizen of the United States, residing'at Sacramento, in the county of Sacramento and State of California, have invented a new and useful Improvement in Drill-Holders, of which the following is a specification.

My invention relates to a drill holder, especially applicable to a pneumatic drill, and has for its object to enable the operator to handle and move the drill in any direction when required to change its position for drilling a succession of holes, without the necessity of lifting and using a tool for re-setting the drlll as at present, thereby saving time and labor and insuring greater accuracy of work,

It consists in features of novelty as hereinafter described and claimed, reference being had to the accompanying drawing forming part of this specification, whereon,

Figure 1, is a perspective side view of my improved drill holder as applied to a pneumatic drill for drilling a series of holes through a steel casting (represented in the present case as part of a double bodybolster andplatform connecting frame for a railroad car) Fig. 2, a side sectional elevation to enlarged scale, of the adjustable arm (broken away) and its appendages forming parts of my improved holder as seen in Fig. 1; Fig. 3, a top plan thereof; Figr-, a vertical transverse section through the same on line 4, 4, in Fig. 2; Fig. 5, a vertical longitudinal section to enlarged scale through the locking block formlng part of the holder as seen to the left of Figs. 1 and 2; Fig. 6, a top plan of the same; Fig. 7, a similar view to Fig. 2 of the pivoted end portion or hub of the adjustable arm as seen tn. the left of Fig. 2, detached, and Fig. 8,, a section to enlarged scale, through the swivel ,joint of the drill carrier forming part of the holder.

Like lettersand numerals of reference de note like parts in all the figures.

the presentcase is afiixed at its lower end toa horizontal base piece 1 adapted to bear on the face of the casting b to be-drilled and firmly secured thereto by a lclamp 2 as shown. Or the post a may be otherwise removably fixed to the casting Z) in any suitable manner.

Projecting from the post a is a horizontally arranged arm 0 which may be of any suitable length and construction, and is adapted to be vertically adjustable along, and radially about the post a. In the present case, the arm 0 is formed at one end with a centrally perforated circular hub or boss 3, which is fitted around and slidable along the post a, the hub 3 being formed circumferentially at its lower end with a semi-circular projection having therein a correspondingly shaped recess 3 which is' concentric with, and diametrically larger than the post a. 4 is a bush or sleeve, which is also slidable along the post a and formed at. its upper end with a circular collar 4 which is adapted to be inserted within the recess 3', whereby the hub 3 is slidable with the bush 4 along the post a and rotatable on the latter independently of the bush 4 which is normally fixed to the post a by a set screw v5, as hereinafter more particularly referred to.

From the periphery of the hub 3 project two opposite and preferably, L-shaped brackets 6 of suitable length, having their upright legs parallel to and spaced apart from each other for receiving one end portion of the upright web of a horizontally ar ranged and preferably, inverted T-shaped bar 7 which may be of any desired length and with the hub 3 constitutes the arm 0 of the holder, the horizontal legs of the brackets 6 bearing on the corresponding end portions of the bottom flanges of the bar 7 and the said legs and flanges fixed together by rivets -8, 8', respectively as shown.

To the underside of the bar 7 at its outer free end is fixed a bearing 9, and to the underside of the bar 7 adjacent to the bush 4 and hub 3 is fixed a similar bearing 10; the bearings 9 and 1-0 being perforated lon 'tudinally and parallel to the underside o the bar 7, and in alinement with each other for the assage therethrough, of a circular rod or s aft 11 having a handle 12 at its outer .end beyond the bearing 9, and having an enlarged screw-threaded portion of suitable length where it passes through and engages with the correspondingly threaded perforation of thebearing 10, the other or inner end of the rod 11 adjacent to the bush 4 being formed with a circular collar 11 which is inserted and rotatable within a semicircular recess 13 formed vertically in a locking block (Z and opening therefrom through its underside, the outer face a" of the block d being knurled or roughened for engagement with the periphery of the bush 4 as hereinafter more'particularly referred to.

The carrier 6 for the pneumatic drill f which is of the usual well-known constructio consists in the present case preferably, of wo parts viz: an upper part adapted to be supported by, and to travel. along the arm 0, and a lower part swiveled to the upper part and engaged by the drill f as hereinafter more particularly described.

The upper part 14 of the carrier 6 is pref-v erably bifurcated and adapted to straddle the base of the bar 7. To the inner face of each branch of the bifurcated portion is pivoted a roller 15 which is adapted circumferentially to bear on and travel along the corresponding bottom flange ofthe bar 7, the part 14 at the junction of its bifurcation beneath the bar 7 being formed with a centr'al vertically dependent circular shank 14' having a central. pocket 16 in, and for a suitable depth from its upper face, and thence formed with a central vertical perforation through the bottom end of the shank 14 for receiving a circular bolt 17 having a head 17 which bears on the bottom of the pocket 16, the bolt 17 projecting below the shank 14 and engaging in a pocket formed therefor in, and for a suitable depth from the upper end face of the lower and preferably circular part 18 of the carrier 6, the bolt 17 being fixed to the=part 18 by a pin 19, or in any other suitable manner. 1

In the meeting faces, or thereabout, respectively of the parts 14 and 18 are formed preferably square shaped (or circular) grooves 20 which are concentric with the bolt 17, the grooves 20 registering with each other for receiving a series of balls 21, whereby the lower part 18 of the carrier e isswiveled to and carried by the upper part 14, and at the same time rotatable at all times independently thereof.

In the bottom end face, and for a suitable depth therefrom, of the lower part 18 is formed a" vertical circular socket 22 in which is centered, and removably fixed by a set screw 23, the pivotal shaft 24 of the vdrill j, which is thereby dependently held by the carrier e ready for use at all times in whatever position the latter is moved.

For holding the carrier e to the bar 7 at any point of its travel along the same, one of the branches of the bifurcation of the upper part 14 is formed with an ear or lug 25 through which is threaded a set screw 26 having a suitable handle 27 within reach of the operator, whereby the free end of the screw 26 can be engaged with the edge of the bar 7. Or any other suitable means may be used for this pur ose.

It will be noted t at theupper end of the shank 14 of the part 14 beneath the bar 7 and above the head of the bolt 17 is so shaped as to be clear of the rod 11 at all times during the travel of the carrier 6 to and fro along the bar 7.

In operation, assuming the parts of the holder while drilling the hole marked y through the casting b to be in their normal position as shown in Fig. 1, or in other words with the bush 4 and combined hub 3 of the arm 0 fixed to the post a by the set screw 5, and the carrier 0 held to the arm 0 by its set screw 26, and the arm 0 locked and prevented from radial movement about the post a by the locking block d having its knurled face 00 in frictional contact with the periphery of the bush 4,-and it being desired on finishing the hole 3 ,to move the drill finto another position for drilling another hole marked a in the casting b, by withdrawing the drill bit from the hole 3 by the drill handle 28, and turning the rod 11 in one direction, or toward the operator, the locking block d, owing to the screwed portion of the rod 11 in its bearing 10, will be released from contact with the bush 4, whereby the arm a will be free to be radially moved in the direction of the hole a to be drilled and should the movement of the carrier e along the bar 7 be necessary for bringing the drill f over the mark a the carrier 6 can be released and free to be moved along the arm 0 by disengaging its set screw 26 from the bar 7. ()n the adjustment of the drill f over the mark 2 being thus made, the locking block (Z and carrier 6 are returned to their normal position or so as to lock the parts of the holder as before, by reversing the movement of the rod- 11 and set screw 26 respectively. Furthermore, if required the arm 0 with the carrier 6 and drill f may be raised or lowered alon the post a by releasing the set screw 5 o the bush 4 from engagement with the post a; or in other words,by' this invention the drill f can be ,moved in any direction and held in the adjustedposition without having to lift and re-adjust it directly by hand and the use of tools as at present, whereby a considerable saving of time and labor is efiected.

What I claim as my invention and desire to secure by Letters Patent is A drill holder, consisting of a member adapted to be .fixed at right angles to the the arm, mea'nsfor fixing the said hush to face of the object to be drilled, an arm iv the fixed-member, and means v for locking oted at right angles to, and slidable a ong the arm to the said bush.

the fixed member, a bush carried by the arm OTTO B. SOHOE NK Y. 6 "and rotatable on the fixed member inde- Witnesses:

pendently from the said arm, a carrier for REGINALD H. CARTER-,1

the drill supported by and movablealong HIRAM 0. LONG. 

